NAME

       gcvt - convert a floating-point number to a string

LIBRARY

       Standard C library (libc, -lc)

SYNOPSIS

       #include <stdlib.h>

       char *gcvt(double number, int ndigit, char *buf);

   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

       gcvt():
           Since glibc 2.17
               (_XOPEN_SOURCE >= 500 && ! (_POSIX_C_SOURCE >= 200809L))
                   || /* glibc >= 2.20 */ _DEFAULT_SOURCE
                   || /* glibc <= 2.19 */ _SVID_SOURCE
           glibc 2.12 to glibc 2.16:
               (_XOPEN_SOURCE >= 500 && ! (_POSIX_C_SOURCE >= 200112L))
                   || _SVID_SOURCE
           Before glibc 2.12:
               _SVID_SOURCE || _XOPEN_SOURCE >= 500

DESCRIPTION

       The  gcvt()  function converts number to a minimal length null-terminated ASCII string and
       stores the result in buf.  It produces ndigit significant digits  in  either  printf(3)  F
       format or E format.

RETURN VALUE

       The gcvt() function returns buf.

ATTRIBUTES

       For an explanation of the terms used in this section, see attributes(7).

       ┌───────────────────────────────────────────────────────────────┬───────────────┬─────────┐
       │Interface                                                      │ Attribute     │ Value   │
       ├───────────────────────────────────────────────────────────────┼───────────────┼─────────┤
       │gcvt()                                                         │ Thread safety │ MT-Safe │
       └───────────────────────────────────────────────────────────────┴───────────────┴─────────┘

STANDARDS

       Marked  as  LEGACY  in  POSIX.1-2001.   POSIX.1-2008  removes the specification of gcvt(),
       recommending the use of sprintf(3) instead (though snprintf(3) may be preferable).

SEE ALSO

       ecvt(3), fcvt(3), sprintf(3)